76 MISSOURI BOTANICAL GARDEN. 



arc remarkably larger and produce a great quantity of 

 fruits. The former variety seems to have undeveloped 

 tigmata, and it may prove to be the male plant. Similar 



n a 



cases of heterogamy are known in Opuntia and MamilU 

 but nothing of the kind has ever been shown in Cereus. 

 This male form at La Mortola corresponds well with the 

 figure in the Botanical Magazine, pi. 3566. Strictly ter- 

 minal flowers, as shown in this plate, are also occasionally 

 produced by our plant. 



Cereus Martianus Zucc. is generally considered as an 

 ally of Cereus flag ell 7/ vrmis Mill. Its flowers, however, 



>f Eucereus; the tube bears bristles. Its posi- 



tion in E 



Plate 12, f. 



Subsection II. Selenicereus A. Berg. 



Stems slender, elongated, sarmentose, rooting. Flowers nocturnal, 

 always very large ; ovary mostly (not always) with long hairs and bristles. 



Cereus (Selenicereus) Bockmannii Otto. 1. c. 147. — Cuba. 

 C. (Selenicereus) calcaratus Web. 1. c. Nachtr. 54. —Costa Rica. 

 C. (Selenicereus) coniflorus Weingart. in Monatsschr. f. K. 1904: 



118. — Haiti ? 



C. (Selenicereus) Donkelaeri Salra. 1. c. 150. — Brazil. 



C. (Selenicereus) grandifiorus Mill. 1. c. 144. —Haiti. 



C. (Selenicereus) hamatus Scheidw. 1. c. 155. —Mexico. 



C. (Selenicereus) hondurensis K. Sch. Weingart in Monatsschr. f. K. 



1904: 147. — Honduras. 

 C. {Selenicereus) inermis Otto. 1. c. 15G. — Venezuela. 

 C. {Selenicereus) Kunthianus Otto. 1. c. 150. —Honduras. 

 C. {Selenicereus) JfacDonaldiae Hook. 1. c. 149.— Honduras? 

 C. {Selenicereus) miravallensis Web. 1. c. Nachtr. 49. — Costa Rica. 

 C. {Selenicereus) nycticalus Link. 1. c. 146. — Haiti, Mexico. 

 C. {Selenicereus) spinulosis P. DC. 1. c. 148. — Mexico. 

 C. {Selenicereus) setaceus Salm. 1. c. 1G2. — Brazil. 



This subsection comprises the Principales and Eostrati 

 of K. Schumann. In some of the flowers bristles are want- 

 ing, and for this reason they would come in close contact 

 with Trichocereus, but their long slender tube removes all 

 doubt as to their true relationship. Cereus setaceus Salm 



